Use of Breath Stacking Technique on Regional Ventilation in Box Chest in Women With Morbid Obesity

Not Applicable

Completed

• Conditions: Morbidly Obese
• Interventions: Other: Placebo-BREATH STACKING; Other: BREATH STACKING

• Registration Number: NCT01551277
• Lead Sponsor: Universidade Federal de Pernambuco

Brief Summary

Objectives: To evaluate the effects of the technique of Breath Stacking (BS) in the distribution of ventilation in the chest in women with morbid obesity. Methods: Randomized clinical trial, blinded, and controlled with 32 women (BMI ≥ 40kg/m2), separated into two groups: control (GC) with n = 16 and 41.94 ± 9.38 years and group Breath Stacking (GBS) , n = 16 and 40.38 ± 10.16 years. Optoelectronic plethysmography (POE) was used to assess lung ventilation. For the BS technique was used to mask the expiratory branch occluded and Wright spirometer. GBS held three techniques with an interval of three minutes. The GC used the same circuit without the occlusion of the expiratory branch. Results: GBS was found to be higher in the contribution of tidal volume (VT) into the chest circumference (p = 0.04) and decrease in abdominal compartment (p = 0.03), whereas the CG showed no difference in distribution. Spirometric variables: FEV1 (%), FVC (%), FEV1/FVC (%), VC and CI showed no difference before and after the technical BS and GBS in the GC. Conclusions: The technique BS altered the distribution pattern of regional ventilation, resulting in greater contribution in lung volume in the lower rib cage, corresponding to activity of the diaphragm, with redistribution of volume between compartments.

Detailed Description

Not available

Study Timeline

• Study Start: 2010-03
• Primary Completion: 2010-12
• Study Completion: 2011-01
• Status Verified: 2012-03
• Study First Submitted: 2012-03-08
• Study First Submitted QC: 2012-03-09
• Last Update Submitted: 2012-03-09
• Study First Posted: 2012-03-12
• Last Update Posted: 2012-03-12

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Female
• Target Recruitment: 32

Inclusion Criteria

• Women aged 19-60 years
• BMI ≥ 40 kg/m2

Exclusion Criteria

• Women with chronic lung disease
• Smokers
• Neuromuscular disease
• Disability in performing the procedures

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Control Group	Placebo-BREATH STACKING	-
BREATH STACKING	BREATH STACKING	-

Primary Outcome Measures

Name	Time	Method
Chest wall regional volume	ten months	We considered as primary outcome regional tidal volumes: total current volume of the chest cavity (Vc), changes in tidal volume of pulmonary rib cage (ΔVc, ctp), tidal volume variation of the abdominal rib cage (ΔVc, CTA) and abdominal tidal volume (ΔVc, ab), and secondary outcome Inspiratory capacity (IC).

Trial Locations

Locations (1)

Universidade Federal de Pernambuco; 🇧🇷 Recife, Pernambuco, Brazil